/*
 * Copyright 2002-2010 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System.Reflection;
using Spring.Aop.Framework;
using Spring.Aop.Support;

namespace Spring.Transaction.Interceptor;

/// <summary>
/// Advisor driven by a <see cref="Spring.Transaction.Interceptor.ITransactionAttributeSource"/>, used to include
/// a <see cref="Spring.Transaction.Interceptor.TransactionInterceptor"/> for methods that
/// are transactional.
/// </summary>
/// <remarks>
/// <p>
/// Because the AOP framework caches advice calculations, this is normally
/// faster than just letting the <see cref="Spring.Transaction.Interceptor.TransactionInterceptor"/>
/// run and find out itself that it has no work to do.
/// </p>
/// </remarks>
/// <author>Rod Johnson</author>
/// <author>Griffin Caprio (.NET)</author>
[Serializable]
public class TransactionAttributeSourceAdvisor : StaticMethodMatcherPointcutAdvisor
{
    private ITransactionAttributeSource _transactionAttributeSource;

    /// <summary>
    /// Initializes a new instance of the <see cref="TransactionAttributeSourceAdvisor"/> class.
    /// </summary>
    /// <remarks>
    /// 	<p>
    /// This is an abstract class, and as such has no publicly
    /// visible constructors.
    /// </p>
    /// </remarks>
    public TransactionAttributeSourceAdvisor()
    {
    }

    /// <summary>
    /// Creates a new instance of the
    /// <see cref="Spring.Transaction.Interceptor.TransactionAttributeSourceAdvisor"/> class.
    /// </summary>
    /// <param name="transactionInterceptor">
    /// The pre-configured transaction interceptor.
    /// </param>
    public TransactionAttributeSourceAdvisor(TransactionInterceptor transactionInterceptor)
        : base(transactionInterceptor)
    {
        SetTxAttributeSource(transactionInterceptor);
    }

    /// <summary>
    /// Sets the transaction interceptor.
    /// </summary>
    /// <value>The transaction interceptor.</value>
    public TransactionInterceptor TransactionInterceptor
    {
        set
        {
            //TODO refactor
            Advice = value;
            SetTxAttributeSource(value);
        }
    }

    /// <summary>
    /// Tests the input method to see if it's covered by the advisor.
    /// </summary>
    /// <param name="method">The method to match.</param>
    /// <param name="targetClass">The <see cref="System.Type"/> to match against.</param>
    /// <returns>
    /// <b>True</b> if the supplied <paramref name="method"/> is covered by the advisor.
    /// </returns>
    public override bool Matches(MethodInfo method, Type targetClass)
    {
        return (_transactionAttributeSource.ReturnTransactionAttribute(method, targetClass) != null);
    }

    /// <summary>
    /// Sets the tx attribute source.
    /// </summary>
    /// <param name="transactionInterceptor">The transaction interceptor.</param>
    protected void SetTxAttributeSource(TransactionInterceptor transactionInterceptor)
    {
        if (transactionInterceptor.TransactionAttributeSource == null)
        {
            throw new AopConfigException("Cannot construct a TransactionAttributeSourceAdvisor using a " +
                                         "TransactionInterceptor that has no TransactionAttributeSource configured.");
        }

        _transactionAttributeSource = transactionInterceptor.TransactionAttributeSource;
    }
}